Electrode holder



Feb. 25, 1930. c, HOLLUP 1,748,346

ELECTRODE HOLDER Filed 0Ct. 11; 1928 Jim Ii mm mm v IHWMIHIHII M l,fl-nz/eido/ C'harles Patented Feb. 25, 1930 UNITED STATE CHARLES H.HOLLUIP, OF CHICAGQ, ILLINOIS, ASSIGNOR TO HOLL'UP CORPORATION, ACORPORATION OF ILLINOIS ELECTRODE HOLDER Application filed tlctober 11,1928. Serial No. 311,849.

My invention relates to improvements in electrode holders.

One object of the invention is to provide an electrode holder havingelectrode clamps or jaws which may be readily renewed, withv outdisturbing the cable connection, in case they are burned by the arc.

Another object is to provide an electrode holder of this type in whichthe heat in the handle is minimized by providing for the circulation ofair therethrough.

In the accompanying drawings I have illustrated two embodiments of myinvention:

Fig. 1 is a side elevation of one form of a the improved electrodeholder;

Fig. 2 isan end view thereof; Fig. 3 is a top plan view with the upperlever and associated parts removed;

Fig. 4 is a side elevation of another form of improved electrode holder'Fig. 5 is a top plan view thereof with certain parts removed; and

Fig. 6 is a top plan view of certain detached parts.

In Figs. 1, 2 and 3, a handle 10 is provided, made preferably of heatinsulating and electric insulating material such as fiber in the form ofa tube. One end of the tube is received within an opening in a shield 11also made of heat resistant material. A metal bracket 12 is secured tothe shield 11 by suitable fastening means such as screws 13. The

bracket spans the opening in the shield 11 and is spaced therefrom buthas a boss l l thereon projecting into said opening. Said boss has arecess which receives the exposed end of the conductor 15 which ispreferably in the form of a cable. The conductors which project from theend of said cable are soldered in said recess. Bracket 12 has a shelf oreX- tension 16 thereon to which an arm 17 is secured by a stud 18. Thebracket and said arm 17 are made of conducting material. The inner endof said arm has an extension or lug 19' received within acorrespondingly shaped slot or recess 20 in the yoke to lock the armagainst pivotal movement about the supporting stud l8.

The outer end of the arm 17 forms one of a pair of clamping jaws 21, 22,one of which 0 is preferably notched or corrugated to more firmly holdthe electrode which is preferably a metallic electrode or welding rod,although not necessarily so. The other jaw 22 forms part of a lever 23which is pivoted to the arm 17 by means of a cotter pin 24. The jaws arenormally held in clamping engagement by means of a stifi spring 25, oneend of which encircles the head of the stud 18, and the other end ofwhich encircles a button 26 of insulating material. A thumb piece 27 isprovided which is preferably in the form of a tubular member of fibre orother electrical insulating and heat insulating material similar to themain handle and shield.

In order to insert an electrode between the clamping jaws, it isnecessary merely to rock the lever 23 by pressure of the thumb on thethumbpiece 27.

If the clamping jaws and associated parts disintegrate, due to theexcessive heat of the arc, so that it is necessary to renew them, thearm 17 may be readily removed from the supporting shelf 16 merely byunscrewing the single stud 18 after first removing the helical spring.Thus renewals may readily be effected without disturbing the permanentcon nection between the bracket and the end of the conductor or cable.

The hollow handle provides a substantial clearance between itself andsaid conductor and is of such diameter as to permit the free circulationof air therethrough, thus minimizing the heat in the handle. The shieldprotects the hand from the excessive heat radiated from the are.

In Figs. 4, 5 and 6, the handle and bracket are substantially the sameas those previously described, and the same reference letters have beenemployed. Instead of a pair of pivoted clamping aws, I provide an arm 28having a screw threaded opening in which is carried a screw threadedshaft 29, the latter passing also through openings in a flat strip ofsteel 30, serving as a clamping member and yieldingly pressed toward thecorrugated jaw 31 by a curved strip of spring steel 32. The pressure maybe increased or relaxed altogether by manipulation of the head 33*of thescrew threaded shaft or stud 29. The arm 28 and associated parts may bereadily removed by removing the single screw 34 as in the case firstdescribed.

It will be noted that there are no metallic parts in the handle, andthat the latter, while supporting the bracket and electrode clampingjaws, is not attached directly to said metal bracket but directlythrough the shield so as to minimize the effect of the heat conductedthrough the metal parts.

What I claim is:

1. An electrode holder comprising a conducting member having a terminalportion to which a conductor may be electrically connected, a heatinginsulating shield secured to said member, a handle carried by saidshield, and a pair of electrode clamping jaws removably secured to saidmember whereby said jaws may be renewed without disturbing saidelectrical connection.

2. An electrode holder comprising a conducting member having a terminalportion to which a conductor may be electrically connected, a heatinsulating shield secured to said member and a hollow handle surroundingsaid conductor and connected to 'said shield, said member carrying adetachable clamp.

3. An electrode holder comprising a conducting member having a recess inwhich the exposed end of a cable may be secured to provide electricalconnection therewith and an electrode clamping device removably securedto said member, a heat insulating shield also secured to said member anda handle secured to said shield at a point other than the point ofattachment of said member.

4. An electrode holder comprising a tubular handle, a disc-like shieldat one end thereof having an opening receiving said handle, a metalbracket secured to said disc and spanning said opening, a hollow boss onsaid bracket projecting into said opening, a conductor passing throughsaid handle and secured in said hollow boss and an electrode clampingdevice detachably secured to said bracket.

5. An electrode holder comprising a handle, a bracket supported therebyhaving a notch therein and a supporting shoulder adjacent thereto, anarm removably secured to said shoulder and fitting within said notch anda clamping member movable with reference to said arm.

6. An electrode holder comprising ahanmy name.

CHARLES H. HOLLUP.

